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> Home > Technology > Beer > Personal RSS XTM > The author . > On Twitter Archive2008-10 - 2008-05 Technology blogs
Robert Barta |
The get-illustration web serviceI'm working on a site that lists the various Topic Maps-related software that's out there, in an effort to make all the tools that have been released more visible. The site in question is, of course, Topic Maps-driven, and so it has, of course, topic pages for the people who created the tools. Those pages inevitably become pretty boring, because the tools site isn't the place to collect lots and lots of information about people. ... Read | 2008-10-28 15:20 | 3 comment(s) TMCLeditIn the open space sessions at TMRA 2008 Hannes Niederhausen, a member of the Topic Maps Lab, presented his thesis project, which he calls TMCLedit. This is essentially a graphical modelling tool based on the initial GTM level 1 proposal. His idea is that it will let users graphically model their ontologies, and be able to import and export them to TMCL. ... Read | 2008-10-26 17:30 | 1 comment(s) GTMalphaAt this year's TMRA Hendrik Thomas presented GTMalpha, a proposed graphical notation for Topic Maps. This proposal was born out of his experiences with drawing Topic Maps examples in discussions with his colleagues, where he got fed up with confusion over what the drawings were meant to show. His presentation is essentially a private proposal for GTM level 0. ... Read | 2008-10-24 14:10 | 1 comment(s) A TMCL tutorialThe TMCL standard now seems more or less stable, and so now it is finally possible to explain to outsiders what the language looks like and how it works. The first thing to note is that TMCL is firmly meant for validation, and not for reasoning. In other words, TMCL is a schema language, rather like DTDs, RELAX-NG, XSD, EXPRESS, SQL DDL, and so on, but one specifically designed for Topic Maps. Note: this has been updated to the latest 2009-06-16 draft. ... Read | 2008-10-03 17:33 | 9 comment(s) A sudoku solver in PythonMy girlfriend likes to solve the sudoku puzzles in the newspaper, but I never bothered with it myself, thinking that I shouldn't spend time on something a computer can do for me. Writing a sudoku solver, however, sounded like it might be fun. And, so, since I had nothing better to do I decided to give it a shot. ... Read | 2008-09-10 16:40 | 12 comment(s) A CTM tutorialThe new compact textual syntax for Topic Maps being standardized by ISO, CTM, is now approaching stability, and so I thought it would be good to provide a little tutorial on it to show people what the syntax looks like in the current draft. With a little luck we might even get some feedback, which would be nice. ... Read | 2008-08-31 15:02 | 1 comment(s) Topic Maps, RDF, semantics, merging ...Michael Sperberg-McQueen wrote a blog post on RDF and Topic Maps where he brought up some interesting questions. I started trying to reply in a comment on his blog, but after writing two full pages I decided to instead turn it into a blog posting here. ... Read | 2008-07-29 16:54 | 1 comment(s) Finally solving the performance problemI wrote about the performance problems the tmphoto application had suffered from, and my failed attempts to fix them. I decided that the problem was that I'd set out to solve the problems without really knowing what the cause was, since reducing traffic by 55% obviously wasn't going to rescue the site. So the solution must be to do some proper research first, and then try to solve it. ... Read | 2008-07-06 14:49 | 1 comment(s) On robots, URL design, and bad optimizationOver the last few weeks my photo collection application has been struggling seriously with its performance. The Tomcat server would sometimes crash, which isn't so serious, as my monitoring script would restart it at most 30 minutes later. What's worse is that often it would get stuck and also make Apache freeze, and this would kill the entire site (including this blog), and the monitor script doesn't detect that. Or, load on the server would soar into the double digits, and just stay there, basically making the server unusable until I did a manual restart. ... Read | 2008-06-25 15:14 | 16 comment(s) The cxtm-tests projectThe cxtm-tests project has just released the first-ever release of a conformance test suite for Topic Maps implementations. The first release consists of 293 separate conformance tests using four different Topic Maps syntaxes, and more tests are being added all the time. It can be used by developers to check their implementations, and also by customers who want to verify that products which claim to conform to the standard actually do so. ... Read | 2008-05-23 18:21 | 1 comment(s) |
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